diff --git a/requirements-dev.txt b/requirements-dev.txt
index 721a010..0410442 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,7 +5,7 @@ pytest==5.3.2
 pytest-cov==2.8.1
 pytest-mock==1.13.0
 coverage==5.0
-sphinx==2.3.0
+sphinx==2.3.1
 pep257==0.7.0
 aiohttp-session==2.9.0
 aiopg[sa]==1.0.0